Stethoscope



Patented b. 2o t 1 Applicationfiled-I octobei" 2131921.. [serial imtdgw.5

mom". '7 Q ngcomparativelythinlandkif a uniform -.Be itknownt I hicknessthfo'ughodt its] superficial area, I Q citizen'v-ofetheU tie I k U Ihere'asithe reaii portion is of g reater thickLBS Philadelphia, in thecountyfof Philadel'phh es s,andis fiirthermore crescen't -wshaped-in Y vand 'State of Pennsylvania, havefinve'nt 'oss 'seotion,wherebythercentral;portion is certain newgfand iuseful Stethosco Irendered more rigidandinto which is-sorew I i which the following iselspecifica -tionv threaded *atgfi the ueflal TI-bow orthe like i? I vThis invention 'frel ates to. 1 Stethoscopes "rtheattachment thereto oi'ithe ear-piece f more pai'ti'cularly adaptedforthedoealiz be 8,a,fragmentjonlyiof which: is,shown ;v 10 tionof sounds iandthe l [I I Ihat'it form no parto'f my sent. in; ;-,l a'r it-refers toalste'tho's'copicjinstrlilnent foi fl I .i

, I i I i ersendothe'rswhen I I I examiningor determin n ei preferablyexistingiinthehuinan body. I I I I I I The'primarylobject.ofthisgi I IImlqalthoughitma b also made from va I I I [the provision'of 'a; simple,Cheapand com: I rlonjs typesofjmetalorinetal alloys, b t inpactstethoscope for refady use-oi application practice Lhave foii'ndthathardrnbb'er or I to various parts of the bodyIWhen examininganalogous .materia-1 gives very "excellent -re- I for the-detectioni'ofconstitutional defects; s'ul'ts.";- fl 1 3 320' Another object of thisinvention is to pro- 'From' the foregoing description it 111 I ide \anovel "forth" of stethoscope-1 hr use readily-seen theltdueto theunitaiiy'foi'ma by iphysiciene medical-1practitioners 'tion and therelatively rediiced 'thickness o which by Virtue of its veryiformationlends ;the frontal' pert*4,;theidisturbinginoise on itself foruse: in normally 'iriaQcessibleon other sound wil- I readily transmittedend 'T v .difficultiocations/ nithehumenibOdy l i ears'ofth'efpersonusing" o 1 A still flirthri'obj'ect of this-invent n StiHKfurther-it isto be 1 provide a stethoscope ofthety e referie I I to the peculiarfox-min cross ,I I I Whichis-neat, compeetendv'eryefiicien sectonofmyimproved stethoscope and "its 1" use i f j f; 'ery thin'-VfronteLportion' or Idiziphragm 4 30 -W-ith the" foregoing'and otherobjects 111 wWith it consequent sensitiveness relative to 'viewaswill:bemore,olearlyJapparentfrom' thebackporti0n'5 thatthe soundsorvibrao the foregoing des'ci'iptiommy;invention c ltions, "listened towill be --reletively eug sis ts essentially"inthe" formation; offlthefmented'endsotransmitted; stethoscopic body propena's aiinitaryIstru jWhilst there has been shown and'described U ture havingopposedfconcavoconvexcross a preferredembodimentot tiny {invention Isection portions, one- "which is thinner fthe' sameHis not-to beconstrued asconcl'l'h I than'th other. Y 1 7 jsiVefii i't a t!" PW lZ'VObViOI I Q hat changes K In" th'e furthe1 f d1 ybefin' dein the'shapeor contonr thereof refe'rence is. toi'befh w thoutfd partingf omthfspi iof thein- 1 I drawings inf 1 1ich. I La mo're'fpai ticularly. defined bythe I r I appended'claiineir' i ibed m ventl'on; w i

; I icnlerly' Obiwe thatfI f": I feke-Iny-improved stethoscope? I of Ihard rubber-'- 01 other" appropriate ma te-f" iHav lng descr la m' eslnewiand thenume'relfl ,I i acomp isin' integiafly formed stethoscopeinltsent' et I I nvexidishedpoz tions'the tieularly ob'served'f'on 7exam I I e i f" F igm e Q' thet it om risesfrontalandream portions 4 5,"respectively-5 bothfofiwhi'ch o "are-ofconcavo-convexfcros Section'd-iame't icallyuof the device, the frontalportion adjoins the frontalportion, said back portion having an elbow attached thereto at itscenter.

2. As a new article of manufacture a stethoscope of hard rubbercomprising integrally formed opposed concave-convex dished portions the-frontal portion whereof 15 of uniform thickness throughout its entiresurface whilst the back portion is of crescent shape cross section witha gradually decreasing thickness from its central part to that pointwhere it adjoins the frontal portion, said back portion having an elbowattached thereto at its center.

JOSEPH A. RA )(DER.

